Hey folks hopefully someone here can help me.
I've set up a bridge on my Ubuntu system to plumb into a VM I have running inside of KVM. The bridge is able to send ARP requests and replies so I have 2 way traffic but no IP traffic is able to pass.
The networking is as follows: vnet0 -> bridge -> eth1 -> VLAN with hosts I am trying to ping
Ping all fail when trying to traverse eth1. I have done TCPDUMPs on my vnet0, bridge and eth1 interfaces. I can see the problem is no IP packets leaving eth1 when sent from vnet0 while they seem to pass through the bridge interface just fine. Also of note, I am using a USB 3.0 gigabit adapter for this connection.
Troubleshooting so far:
- Disabled IPv6 via sysctl.conf thinking that may somehow be a problem
- Moved the USB adapter to a different USB port
- Deleted and Created bridge multiple times
- Reboots
Stumped. Any idea why only L2 can pass? My VM learns MAC addresses for systems through eth1 via arp but cannot sent IP packets through.
Thanks